CN112961009A - Papermaking sludge nutrient soil and preparation method thereof - Google Patents
Papermaking sludge nutrient soil and preparation method thereof Download PDFInfo
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- CN112961009A CN112961009A CN202110206763.1A CN202110206763A CN112961009A CN 112961009 A CN112961009 A CN 112961009A CN 202110206763 A CN202110206763 A CN 202110206763A CN 112961009 A CN112961009 A CN 112961009A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/60—Biocides or preservatives, e.g. disinfectants, pesticides or herbicides; Pest repellants or attractants
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
- A01G24/12—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material containing soil minerals
- A01G24/15—Calcined rock, e.g. perlite, vermiculite or clay aggregates
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
- A01G24/22—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing plant material
- A01G24/25—Dry fruit hulls or husks, e.g. chaff or coir
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
- A01G24/28—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing peat, moss or sphagnum
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/80—Separation, elimination or disposal of harmful substances during the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention provides a paper sludge nutrient soil, which comprises the following raw materials in parts by weight: 50-60% of paper-making sludge with the water content of 60%, 5-15% of kitchen garbage, 2-4% of peanut shells, 5-8% of peat soil, 5-10% of coconut coir, 2-4% of vermiculite, 2-4% of vesuvianite, 2-4% of perlite, 2-4% of dolomite powder and 1% of organic fertilizer leavening agent, wherein the organic fertilizer leavening agent comprises alcaligenes faecalis, the kitchen waste provides rich nitrogen elements to improve the carbon-nitrogen ratio of the paper-making sludge compost product, so that the paper-making sludge compost product has the advantages of rich nutrition and balanced fertilizer efficiency, meanwhile, the preparation method of the paper-making sludge nutrient soil is provided, the paper-making sludge can be subjected to harmless treatment, the fermentation period is short, the obtained paper-making sludge nutrient soil is balanced in fertilizer efficiency, low in pest and disease incidence rate, good in air permeability and water retention and extremely high in economic benefit.
Description
Technical Field
The invention relates to the technical field of papermaking sludge waste treatment, in particular to papermaking sludge nutrient soil and a preparation method thereof.
Background
During production, a large amount of organic wastewater containing fibers is generated by paper-making and pulping enterprises, and paper-making sludge generated after the organic wastewater is treated by a wastewater treatment process becomes a new pollution source. The papermaking sludge has complex components, high organic matter content, high water content, large volume and the like, can generate stink after being placed, and can cause the problems of air pollution, soil pollution and the like if not properly treated. Therefore, how to treat the sludge is a difficult problem for paper making enterprises.
At present, the most common treatment mode is that the water content of the paper mill sludge is reduced to a certain standard through dewatering equipment or naturally dried, and then the paper mill sludge is sent to a garbage disposal site for landfill, so that land resources are wasted, soil and underground water pollution can be caused when anti-seepage measures are not in place, the cost of sludge landfill is higher and higher along with the increasing shortage of land resources, and the method belongs to the aspects of time and labor consumption and no benefit. The components of the paper-making sludge are measured, and the paper-making sludge belongs to biosolid waste, and contains a large amount of cellulose organic matters, plant nutrients such as nitrogen, phosphorus, potassium and the like, and trace heavy metals and pathogenic bacteria. Based on the characteristic of the papermaking sludge, the papermaking sludge is required to be recycled so as to realize harmless treatment of the papermaking sludge, reduce pollution generation and emission in the papermaking production process to the maximum extent, eliminate pollution and improve the resource utilization rate.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the paper-making sludge nutrient soil with balanced fertilizer efficiency and low incidence of plant diseases and insect pests, and provides the preparation method of the paper-making sludge nutrient soil.
The invention provides a paper sludge nutrient soil, which comprises the following raw materials in parts by weight: 50-60% of paper mill sludge with the water content of 60%, 5-15% of kitchen garbage, 2-4% of peanut shells, 5-8% of peat soil, 5-10% of coconut coir, 2-4% of vermiculite, 2-4% of vesuvianite, 2-4% of perlite, 2-4% of dolomite powder and 1% of organic fertilizer leavening agent, wherein the organic fertilizer leavening agent comprises alcaligenes faecalis.
In one embodiment, the paper sludge nutrient soil comprises the following raw materials in parts by weight: 60% of paper mill sludge with the water content of 60%, 10% of kitchen garbage, 4% of peanut shells, 1% of organic fertilizer leavening agent, 5% of peat soil, 10% of coconut coir, 4% of vermiculite, 2% of volcanic rock, 2% of perlite and 2% of dolomite powder.
In one embodiment, the plasma deodorization technique is used for deodorization during the preparation process.
The papermaking sludge comprises four types of primary sludge, secondary sludge, mixed sludge and deinking sludge, wherein the sludge generated by log fibers is primary sludge, the sludge generated by decomposing organic matters by adopting biological treatment is secondary sludge, the secondary sludge is also called active sludge, the mixture of the primary sludge and the secondary sludge is mixed sludge, and the sludge generated by deinking the recycled waste paper is deinking sludge, and the deinking sludge has the characteristics of low carbon-nitrogen ratio and main existence of nitrogen element in the form of organic nitrogen.
According to the paper sludge nutrient soil provided by the invention, in the composting stage, the paper sludge is used as a main raw material, the kitchen waste and the peanut shells are used as auxiliary materials, and an organic fertilizer leavening agent containing alcaligenes faecalis is used for carrying out composting fermentation to decompose organic matters in the paper sludge, the kitchen waste and the peanut shells, so that the effects of heating, deodorizing, eliminating plant diseases and insect pests and improving nutrients are achieved. The organic fertilizer starter contains the alcaligenes faecalis, so that the degradation rate of organic matters can be further improved, the organic nitrogen of kitchen garbage is promoted to be converted into inorganic nitrogen, the carbon-nitrogen ratio of compost products is improved, the fertilizer efficiency is more balanced, and meanwhile, the alcaligenes faecalis promoted to grow other bacteria and promote all bacteria to be compounded into dominant bacteria. After composting, the available form nutrients of plants in the compost products are increased, the bioavailability of heavy metals is reduced, and the improvement of the physical and chemical properties of soil is facilitated. The composted product is mixed with raw materials such as peat soil, coconut chaff, vermiculite, volcanic rock, perlite and dolomite powder, and the mixture is uniformly stirred to obtain the paper-making sludge nutrient soil, wherein the peat soil is rich in nitrogen, the coconut chaff has a good pore structure and a strong water retention capacity, the vermiculite has an ion exchange capacity, the paper-making sludge nutrient soil has a great effect on the nutrition of soil, the volcanic rock has uniform water and gas distribution, natural honeycomb porosity, an optimal growth environment of zooglea and a large specific surface area, and is beneficial to the mass transfer process of oxygen, nutrient substances and wastes generated by metabolism in the microbial metabolism process, the perlite has the effect of regulating soil hardening, and the dolomite powder has further effects of insect prevention and killing, so that the incidence rate of diseases and insect pests is low when the paper-making sludge nutrient soil is applied to planting.
The invention also provides a preparation method of the paper sludge nutrient soil, which comprises the following steps:
1) crushing the paper mill sludge with the water content of 60% for later use, weighing 50-60% of the crushed paper mill sludge with the water content of 60%, 5-15% of the crushed kitchen garbage, 2-4% of peanut shells and 1% of an organic fertilizer leavening agent according to the following weight ratio, and feeding the weighed materials into a fermentation tank;
2) piling up the crushed paper-making sludge, the crushed kitchen garbage and the peanut shells in the fermentation tank into a pile for aerobic composting;
3) ventilating with blower 2-3 days after stacking for 30min in the morning and evening at flow rate of 0.15m3Min for 15-20 days;
4) and (2) feeding the fermented material obtained by composting into a stirring tank, adding 4-8% of peat soil, 5-10% of coconut husk, 2-4% of vermiculite, 2-4% of volcanic rock, 2-4% of perlite and 2-4% of dolomite powder according to the following weight ratio, and uniformly stirring to obtain the paper sludge nutrient soil.
In one embodiment, in the step 2), the pulverized paper-making sludge, the pulverized kitchen garbage and the peanut shells are stacked into a trapezoidal or triangular strip pile.
In one embodiment, the step 3) further includes: and when the stack is ventilated for 10-15 days, turning and throwing the stack, and screening the obtained fermented materials when the composting is finished.
According to the preparation method of the paper-making sludge nutrient soil, the paper-making sludge raw material can be primary sludge which is only treated by physical methods such as filtration and precipitation, and the paper-making sludge is crushed before composting fermentation, so that the paper-making sludge can be in good contact with air, organic matters are decomposed under aerobic conditions, and aerobic composting is fully performed; by adopting a forced ventilation static stack system, the ventilation and the temperature of the stack body can be well controlled, so that the composting period is relatively shortened; the paper making sludge, peat soil, coconut husk, vermiculite, volcanic rock, perlite and dolomite powder are used as main components, can play a role in thoroughly deodorizing, decomposing, killing insects and sterilizing, and has the advantages of rich nutrition, good air permeability and water retention and good economic benefit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.
Example 1
1) Feeding the paper making sludge with the water content of 60% into a crusher to be crushed for standby, and crushing the paper making sludge according to the weight ratio of 50: 14: 3, weighing the crushed paper mill sludge with the water content of 60%, the crushed kitchen garbage and the peanut shells according to the weight ratio, feeding the weighed materials into a fermentation tank, feeding an organic fertilizer leavening agent containing alcaligenes faecalis accounting for 1% of the total amount into the fermentation tank, adding a proper amount of water, mixing uniformly, and fermenting;
2) piling the smashed kitchen garbage and peanut shells in the fermentation tank into a stack for aerobic composting, wherein the fermentation temperature reaches 50 ℃, and the fermentation is carried out for 21 days in summer and 25 days in winter;
3) stacking for 3 daysThen, ventilating with blower for 30min in the morning and evening and at flow rate of 0.15m3Min, lasting for 15 days;
4) when the stack is ventilated for 12 days, turning the stack by a turner, and screening the obtained fermented materials when composting is finished;
5) and (3) feeding the fermented material into a stirring tank, adding 67%, 10%, 4%, 2% and 2% of fermented material, peat soil, coconut husk, vermiculite, vesuvianite, perlite and dolomite powder in dry mass percentage of the whole into the stirring tank, uniformly mixing, and discharging to obtain the finished product of the papermaking sludge nutrient soil.
Example 2
1) Feeding the paper-making sludge with the water content of 60% into a crusher to be crushed for later use according to the ratio of 55: 10: 2, weighing the crushed paper mill sludge with the water content of 60%, the crushed kitchen garbage and the peanut shells according to the weight ratio, feeding the weighed materials into a fermentation tank, feeding an organic fertilizer leavening agent containing alcaligenes faecalis accounting for 1% of the total amount into the fermentation tank, adding a proper amount of water, mixing uniformly, and fermenting;
2) piling the smashed kitchen garbage and peanut shells in the fermentation tank into a stack for aerobic composting, wherein the fermentation temperature reaches 50 ℃, and the fermentation is carried out for 23 days in summer and 27 days in winter;
3) ventilating with blower 3 days after stacking for 30min in the morning and evening at flow rate of 0.15m3Min, lasting 18 days;
4) when the stack is ventilated for 15 days, turning the stack by a turner, and screening the obtained fermented materials when composting is finished;
5) and (3) feeding the fermented material into a stirring tank, adding 67%, 10%, 2%, 5%, 3% and 2% of fermented material, peat soil, coconut husk, vermiculite, vesuvianite, perlite and dolomite powder in dry mass percentage of the whole into the stirring tank, uniformly mixing, and discharging to obtain the finished product of the papermaking sludge nutrient soil.
Example 3
1) Feeding the paper making sludge with the water content of 60% into a crusher to be crushed for later use according to the proportion of 60: 5: 2, weighing the crushed paper mill sludge with the water content of 60%, the crushed kitchen garbage and the peanut shells according to the weight ratio, feeding the weighed materials into a fermentation tank, feeding an organic fertilizer leavening agent containing alcaligenes faecalis accounting for 1% of the total amount into the fermentation tank, adding a proper amount of water, mixing uniformly, and fermenting;
2) piling the smashed kitchen garbage and peanut shells in the fermentation tank into a stack for aerobic composting, wherein the fermentation temperature reaches 50 ℃, and the fermentation is carried out for 23 days in summer and 27 days in winter;
3) ventilating with blower 3 days after stacking for 30min in the morning and evening at flow rate of 0.15m3Min, lasting 18 days;
4) when the stack is ventilated for 15 days, turning the stack by a turner, and screening the obtained fermented materials when composting is finished;
5) and (3) feeding the fermented material into a stirring tank, adding 67%, 10%, 2%, 5%, 3% and 2% of fermented material, peat soil, coconut husk, vermiculite, vesuvianite, perlite and dolomite powder in dry mass percentage of the whole into the stirring tank, uniformly mixing, and discharging to obtain the finished product of the papermaking sludge nutrient soil.
Comparative example 1
1) Feeding the paper-making sludge with the water content of 60% into a crusher to be crushed for later use, feeding the crushed paper-making sludge with the water content of 60% into a fermentation tank, feeding an organic fertilizer leavening agent which accounts for 1% of the total amount and does not contain the alcaligenes faecalis into the fermentation tank, adding a proper amount of water, mixing uniformly, and fermenting;
2) piling the paper sludge crushed in the fermentation tank into a stack for aerobic composting, wherein the fermentation temperature reaches 50 ℃, and the fermentation is carried out for 21 days in summer and 25 days in winter;
3) ventilating with blower 3 days after stacking for 30min in the morning and evening at flow rate of 0.15m3Min, lasting for 15 days;
4) when the stack is ventilated for 12 days, turning the stack by a turner, and screening the obtained fermented materials when composting is finished;
5) and (3) feeding the fermented material into a stirring tank, adding 50%, 10%, 4% and 2% of fermented material, peat soil, coconut husk, vermiculite, vesuvianite and perlite in dry mass percentage of the whole into the stirring tank, uniformly mixing, and discharging to obtain the finished product of the papermaking sludge nutrient soil.
Comparative example 2
1) Feeding the paper-making sludge with the water content of 60% into a crusher to be crushed for later use, feeding the crushed paper-making sludge with the water content of 60% into a fermentation tank, feeding an organic fertilizer leavening agent which accounts for 1% of the total amount and does not contain the alcaligenes faecalis into the fermentation tank, adding a proper amount of water, mixing uniformly, and fermenting;
2) piling the paper sludge crushed in the fermentation tank into a stack for aerobic composting, wherein the fermentation temperature reaches 50 ℃, and fermenting for 23 days in summer and 27 days in winter;
3) ventilating with blower 3 days after stacking for 30min in the morning and evening at flow rate of 0.15m3Min, lasting 18 days;
4) when the stack is ventilated for 15 days, turning the stack by a turner, and screening the obtained fermented materials when composting is finished;
5) and (3) feeding the fermented material into a stirring tank, adding 60%, 10%, 2%, 5% and 3% of fermented material, peat soil, coconut husk, vermiculite, vesuvianite and perlite in dry mass percentage of the whole into the stirring tank, uniformly mixing, and discharging to obtain the finished product of the papermaking sludge nutrient soil.
Comparative example 3
1) Feeding the paper-making sludge with the water content of 60% into a crusher to be crushed for later use, feeding the crushed paper-making sludge with the water content of 60% into a fermentation tank, feeding an organic fertilizer leavening agent which accounts for 1% of the total amount and does not contain the alcaligenes faecalis into the fermentation tank, adding a proper amount of water, mixing uniformly, and fermenting;
2) piling the paper sludge crushed in the fermentation tank into a stack for aerobic composting, wherein the fermentation temperature reaches 60 ℃, and fermenting for 25 days in summer and 30 days in winter;
3) ventilating with blower 3 days after stacking for 30min in the morning and evening at flow rate of 0.15m3Min, lasting for 20 days;
4) when the stack is ventilated for 17 days, turning the stack by a turner, and screening the obtained fermented materials when composting is finished;
5) and (3) feeding the fermented material into a stirring tank, adding 65%, 10%, 2%, 5% and 3% of fermented material, peat soil, coconut husk, vermiculite, vesuvianite and perlite in dry mass percentage of the whole into the stirring tank, uniformly mixing, and discharging to obtain the finished product of the papermaking sludge nutrient soil.
The paper mill sludge nutrient soil can be used as a base fertilizer for application in plant flowers, 6 groups of tomato tree seedlings with the same growth vigor are selected, the finished products of the paper mill sludge nutrient soil prepared in the examples 1, 2 and 3 and the comparative examples 1, 2 and 3 are respectively selected as pot culture base fertilizers of the 6 groups of tomato trees, and on the premise of ensuring the same other culture conditions, compared with the comparative examples 1, 2 and 3, the tomato trees using the paper mill sludge nutrient soil obtained in the examples 1, 2 and 3 as the base fertilizer have the advantages of high fertilizer efficiency, improved fresh weight and yield of each plant, and reduced incidence of plant diseases and insect pests, which shows that the obtained paper mill sludge nutrient soil has higher fertilizer efficiency, thorough insecticidal and sterilization in the preparation process and lower incidence of plant diseases and insect pests.
According to the paper sludge nutrient soil provided by the invention, in the composting stage, the paper sludge is used as a main raw material, the kitchen waste and the peanut shells are used as auxiliary materials, and an organic fertilizer leavening agent containing alcaligenes faecalis is used for carrying out composting fermentation to decompose organic matters in the paper sludge, the kitchen waste and the peanut shells, so that the effects of heating, deodorizing, eliminating plant diseases and insect pests and improving nutrients are achieved. The organic fertilizer starter contains the alcaligenes faecalis, so that the degradation rate of organic matters can be further improved, the organic nitrogen of kitchen garbage is promoted to be converted into inorganic nitrogen, the carbon-nitrogen ratio of compost products is improved, the fertilizer efficiency is more balanced, and meanwhile, the alcaligenes faecalis promoted to grow other bacteria and promote all bacteria to be compounded into dominant bacteria. After composting, the available form nutrients of plants in the compost products are increased, the bioavailability of heavy metals is reduced, and the improvement of the physical and chemical properties of soil is facilitated. The composted product is mixed with raw materials such as peat soil, coconut chaff, vermiculite, volcanic rock, perlite and dolomite powder, and the mixture is uniformly stirred to obtain the paper-making sludge nutrient soil, wherein the peat soil is rich in nitrogen, the coconut chaff has a good pore structure and a strong water retention capacity, the vermiculite has an ion exchange capacity, the paper-making sludge nutrient soil has a great effect on the nutrition of soil, the volcanic rock has uniform water and gas distribution, natural honeycomb porosity, an optimal growth environment of zooglea and a large specific surface area, and is beneficial to the mass transfer process of oxygen, nutrient substances and wastes generated by metabolism in the microbial metabolism process, the perlite has the effect of regulating soil hardening, and the dolomite powder has further effects of insect prevention and killing, so that the incidence rate of diseases and insect pests is low when the paper-making sludge nutrient soil is applied to planting.
According to the preparation method of the paper-making sludge nutrient soil, the paper-making sludge raw material can be primary sludge which is only treated by physical methods such as filtration and precipitation, and the paper-making sludge is crushed before composting fermentation, so that the paper-making sludge can be in good contact with air, organic matters are decomposed under aerobic conditions, and aerobic composting is fully performed; by adopting a forced ventilation static stack system, the ventilation and the temperature of the stack body can be well controlled, so that the composting period is relatively shortened; the paper making sludge, peat soil, coconut husk, vermiculite, volcanic rock, perlite and dolomite powder are used as main components, can play a role in thoroughly deodorizing, decomposing, killing insects and sterilizing, and has the advantages of rich nutrition, good air permeability and water retention and good economic benefit.
Claims (6)
1. The papermaking sludge nutrient soil is characterized by comprising the following raw materials in parts by weight: 50-60% of paper mill sludge with the water content of 60%, 5-15% of kitchen garbage, 2-4% of peanut shells, 5-8% of peat soil, 5-10% of coconut coir, 2-4% of vermiculite, 2-4% of vesuvianite, 2-4% of perlite, 2-4% of dolomite powder and 1% of organic fertilizer leavening agent, wherein the organic fertilizer leavening agent comprises alcaligenes faecalis.
2. The paper sludge nutrient soil as claimed in claim 1, which comprises the following raw materials in parts by weight: 60% of paper mill sludge with the water content of 60%, 10% of kitchen garbage, 4% of peanut shells, 1% of organic fertilizer leavening agent, 5% of peat soil, 10% of coconut coir, 4% of vermiculite, 2% of volcanic rock, 2% of perlite and 2% of dolomite powder.
3. The preparation method of the paper sludge nutrient soil is characterized by comprising the following steps:
1) crushing the paper mill sludge with the water content of 60% for later use, weighing 50-60% of the crushed paper mill sludge with the water content of 60%, 5-15% of the crushed kitchen garbage, 2-4% of peanut shells and 1% of an organic fertilizer leavening agent according to the following weight ratio, and feeding the weighed materials into a fermentation tank;
2) piling up the crushed paper-making sludge, the crushed kitchen garbage and the peanut shells in the fermentation tank into a pile for aerobic composting;
3) ventilating with blower 2-3 days after stacking for 30min in the morning and evening at flow rate of 0.15m3Min for 15-20 days;
4) and (2) feeding the fermented material obtained by composting into a stirring tank, adding 4-8% of peat soil, 5-10% of coconut husk, 2-4% of vermiculite, 2-4% of volcanic rock, 2-4% of perlite and 2-4% of dolomite powder according to the following weight ratio, and uniformly stirring to obtain the paper sludge nutrient soil.
4. The method for preparing nutrient soil for paper mill sludge according to claim 3, wherein in the step 2), the pulverized paper mill sludge, the pulverized kitchen garbage and the peanut shells are piled up in a trapezoidal or triangular strip pile.
5. The method for preparing the paper sludge nutrient soil according to claim 3, wherein the step 3) further comprises: and when the stack is ventilated for 10-15 days, turning and throwing the stack, and screening the obtained fermented materials when the composting is finished.
6. The method for preparing the nutrient soil for paper sludge according to claim 3, wherein the deodorization is performed by using a plasma deodorization technique in the preparation process.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114287315A (en) * | 2021-12-24 | 2022-04-08 | 南京小田网络科技有限公司 | Gardening nutrient soil produced by composting urban domestic sludge |
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| CN114287315A (en) * | 2021-12-24 | 2022-04-08 | 南京小田网络科技有限公司 | Gardening nutrient soil produced by composting urban domestic sludge |
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Application publication date: 20210615 |